Username vs Display name vs Contact name.
Currently to sign in to Community we use our FamilySearch username and password.
The name that shows on the screen to the public is the same as the FamilySearch CONTACT NAME, yet Community calls it the USERNAME. But it is different than the name you use to sign in to Community.
Please change the name of the name showing in Community to "Contact Name" so it matches the terminology we are using in FamilySearch.